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dc.contributor.authorCzarnitzki, Dirken_US
dc.contributor.authorHussinger, Katrinen_US
dc.contributor.authorLeten, Barten_US
dc.date.accessioned2011-04-14en_US
dc.date.accessioned2011-04-18T11:43:27Z-
dc.date.available2011-04-18T11:43:27Z-
dc.date.issued2011en_US
dc.identifier.piurn:nbn:de:bsz:180-madoc-31661-
dc.identifier.urihttp://hdl.handle.net/10419/44985-
dc.description.abstractThere is a growing literature that aims at assessing the private value of knowledge assets and patents. It has been shown that patents and their quality as measured by citations received by future patents contribute significantly to the market value of firms beyond their R&D stocks. This paper goes one step further and distinguishes between different types of forward citations patents can receive at the European Patent Office. While a patent can be cited as non-infringing state of the art, it can also be cited because it threatens the novelty of patent applications ('blocking citations'). Empirical results from a market value model for a sample of large, R&D-intensive U.S., European and Japanese firms show that patents frequently cited as blocking references have a higher economic value for their owners than patents cited for nonblocking reasons. This finding adds to the patent value literature by showing that different types of patent citations carry different information on the economic value of patents. The result further suggests that the total number of forward citations can be an imprecise measure of patent value.en_US
dc.language.isoengen_US
dc.publisherZentrum für Europäische Wirtschaftsforschung (ZEW) Mannheimen_US
dc.relation.ispartofseriesZEW Discussion Papers 11-021en_US
dc.subject.jelO31en_US
dc.subject.jelO34en_US
dc.subject.jelO38en_US
dc.subject.ddc330en_US
dc.subject.keywordMarket Valueen_US
dc.subject.keywordPatentsen_US
dc.subject.keywordCitationsen_US
dc.subject.keywordPatent Valueen_US
dc.titleThe market value of blocking patent citationsen_US
dc.typeWorking Paperen_US
dc.identifier.ppn656455268en_US
dc.rightshttp://www.econstor.eu/dspace/Nutzungsbedingungenen_US
dc.identifier.repecRePEc:zbw:zewdip:11021-
Appears in Collections:Publikationen von Forscherinnen und Forschern des ZEW
ZEW Discussion Papers

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